参数资料
型号: MB90F523PFF
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP120
封装: PLASTIC, LQFP-120
文件页数: 92/106页
文件大小: 1541K
代理商: MB90F523PFF
MB90520 Series
86
(2) Specification for Power-on Reset
(AVSS = VSS = 0.0 V, TA = –40
°C to +85°C)
* : VCC must be kept lower than 0.2 V before power-on.
Notes: The above ratings are values for causing a power-on reset.
There are internal registers which can be initialized only by a power-on reset.
Apply power according to this rating to ensure initialization of the registers.
Parameter
Symbol
Pin name Condition
Value
Unit
Remarks
Min.
Max.
Power supply rising time
tR
VCC
0.05
30
ms
*
Power supply cut-off time
tOFF
VCC
4—
ms
Due to repeated
operations
VCC
tOFF
0.2 V
2.7 V
0.2 V
tR
VSS
Sudden changes in the power supply voltage may cause a power-on reset.
To change the power supply voltage while the device is in operation, it is recommended to raise the voltage
smoothly to suppress fluctuations as shown below.
In this case, change the supply voltage when the PLL clock is not in use. If the voltage drops 1 V or less per
second, however, the PLL clock may be used.
VCC
0.2 V
It is recommended to keep the rising
speed of the supply voltage at 50 mV/ms
or slower.
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